Dental and surgical lamp



April 14, 1925.

c. R. PEL-ron ET AL DENTAL AND sURGIAL Lm? Filed Mayv 16 1925 gmlehafn WEZ@ vus Patented Apr. 14, 1925..

UNITED STATES PATENT- oFFFlcE.

CHAUNCEY R. IPELTON AND HAROLD W.

HOUGrIFI'lON", OF DETROIT, MICHIGAN, AS-

SIGNORS T0 PIELTON 86 CRANE COMPANY, 0F DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

Application led May 16,

To all 'whom it may 00a-cern.'

Be it known that we, CHAUNCEY R. PEL- 'roN and HAROLD W. HoUGn'roN, citizens of the United States, residing at Detroit, in the county of Vayne and State of Michigan, have invented certain new and `useful Improvements in Dental and Surgical Lamps, lof which the following is a specification.

This invention relates to dental or surgical lamps, and has for its object a lamp especially designed for use behind the teeth. Incandescent electric lights for this purpose are not broadly new, but so far as we know, no one has heretofore designed a lamp that has the advantages and obtains the results of our improved lamp.

It is the ob 'ect of the invention to provide a lampl which is most convenient to handle and use and which at the same time can concentrate the rays on a definite spot without undue dispersion of light. This we accomplish by the design about to be described.

In the drawings:

Figxl is an enlarged elevation of some of the lower front teeth showing the use of the lamp behind the teeth.

1 Fig. 2 is a longitudinal sectionof-the Flg. 3 is a section taken on the line 3-3 of Fig. 2.

Fig. 4 is a section taken on the line `4L--4 of Fig. 2. I Fig. 5 is a fragmentary elevation of the head of the lamp.

A long slender glass tube a is employed with an opaque glass covering b, preferably a glossy white. This glass tube has a serpents head or a bulbo-us portion provided with a single eye or lens o at the flat side of the serpents head for the purpose of transmitting the lightrays. The glass in this lens is thickened in a lens-like manner. The opaque coating b extends around the larger portion of the serpents head but is omitted over the lens. The filament is located in the serpents head or in close proximity thereto. By making the head in the form of a serpents head, or bulbous, this enlarges this portion of the tube so that the opaque coating can be brought close to the side ofthe lens to prevent any side dispersion of the light rays. This is es DENTAI AND SURGICAL LAMP.

1923. Serial No. 639,311.

' pecially advantageous in illuminating teeth as illustrated in Fig. 1. The light will be` concentrated in a relatively small ring. The letter d represents the outline 'of the lens, and letter c shows the light spot passing through the teeth and of a slightly greater diameter than the lens. This, in a measure, indicates how by enlarging the tube at the end to form a serpents head, a fairly flat surface canbe afforded for the desired dimen'sioned lens without in effect bending the lens to as tocause it to disperse the light at the sides. The filament within the elongated tube may be supported in any suitable way. have shown it supported in a separate sealed minute glass bulb on the 'end of a silkwrapped cord, but obviously other ways could be adopted.

Not only does this form of lamp secure a better ray projection on the parts under examination, but it is mucheasier to handle than either a straight elongated tube or a crooked elongated tube with the -lense in the end of the tube. In either one of these forms, the lens must be very much more sharply convex and consequently the ray dispersion is very much greater. In short, our form of lamp afords a very much better 'spot light than either of the forms referred to. It is a concentration of the light rays in a single spot that is desirable in Work of this kind.

What we claim is: p

l. A dental or surgical lamp, comprismg an elongated transparent tube having at the end an enlarged bulbous head, thickened on one side thereof to form al lens, a non-transparent white glass covering entirely surrounding said transparent tube except at -the lens portion thereof, and light projecting means within said bulbous head.

2. A dental or surgical lamp, comprising an elongated transparent tube having at the end an enlarged bulbous head and formed with` a lens on one side of said head, a nontransparent glass covering surrounding said transparent tube and bulbous head with the exception of the lens portion, and light pro- 'lecting means within said bulbous shaped 3. A dental or surgical lamp, comprising an elongated transparent tube having at the end an enlarged bulbous head provided on one side of the head with a lens of relatively smaller diameter than the head, a non-transparent glass covering surrounding said transparent tube and head withthe exception of the lens portion, and light projecting means Within said bulbous shaped head.

4. A dental or surgical lamp, comprising an elongated transparent tube having at the end an enlarged bulbous head provided on one side with a relatively Hat portion provided with a ltransparent lens of smaller diameter than the head, a non-transparent glass covering surrounding said tube and enlarged head with the exception of the 15 CHAUNCEY R. PELTON. HAROLD XV. HOUGHTON. 

